Final answer:
Gas prices have increased by approximately 6.3%.
Step-by-step explanation:
To find the percentage increase in gas prices, we need to calculate the difference between the initial price and the final price, divide that difference by the initial price, and then multiply by 100 to get the percentage.
Initial price: $3.33 per gallon
Final price: $3.54 per gallon
Percentage increase = ((Final price - Initial price) / Initial price) × 100
Percentage increase = ((3.54 - 3.33) / 3.33) × 100 = 0.21 / 3.33 × 100 ≈ 6.3%
Therefore, gas prices have increased by approximately 6.3%.